288 lines
11 KiB
C++
288 lines
11 KiB
C++
/* -*- Mode: C++; c-file-style: "gnu"; indent-tabs-mode:nil; -*- */
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/*
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* Copyright (c) 2019 University of Washington
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation;
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* Author: Sébastien Deronne <sebastien.deronne@gmail.com>
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*/
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//
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// This example program can be used to experiment with spatial
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// reuse mechanisms of 802.11ax.
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//
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// The geometry is as follows:
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//
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// STA1 STA1
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// | |
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// d1 | |d2
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// | d3 |
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// AP1 -----------AP2
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//
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// STA1 and AP1 are in one BSS (with color set to 1), while STA2 and AP2 are in
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// another BSS (with color set to 2). The distances are configurable (d1 through d3).
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//
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// STA1 is continously transmitting data to AP1, while STA2 is continuously sending data to AP2.
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// Each STA has configurable traffic loads (inter packet interval and packet size).
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// It is also possible to configure TX power per node as well as their CCA-ED tresholds.
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// OBSS_PD spatial reuse feature can be enabled (default) or disabled, and the OBSS_PD
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// threshold can be set as well (default: -72 dBm).
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// A simple Friis path loss model is used and a constant PHY rate is considered.
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//
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// In general, the program can be configured at run-time by passing command-line arguments.
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// The following command will display all of the available run-time help options:
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// ./waf --run "wifi-spatial-reuse --help"
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//
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// By default, the script shows the benefit of the OBSS_PD spatial reuse script:
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// ./waf --run wifi-spatial-reuse
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// Throughput for BSS 1: 6.6468 Mbit/s
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// Throughput for BSS 2: 6.6672 Mbit/s
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//
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// If one disables the OBSS_PD feature, a lower throughput is obtained per BSS:
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// ./waf --run "wifi-spatial-reuse --enableObssPd=0"
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// Throughput for BSS 1: 5.8692 Mbit/s
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// Throughput for BSS 2: 5.9364 Mbit/
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//
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// This difference between those results is because OBSS_PD spatial
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// enables to ignore transmissions from another BSS when the received power
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// is below the configured threshold, and therefore either defer during ongoing
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// transmission or transmit at the same time.
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//
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#include "ns3/command-line.h"
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#include "ns3/config.h"
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#include "ns3/string.h"
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#include "ns3/spectrum-wifi-helper.h"
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#include "ns3/ssid.h"
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#include "ns3/mobility-helper.h"
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#include "ns3/application-container.h"
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#include "ns3/multi-model-spectrum-channel.h"
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#include "ns3/wifi-net-device.h"
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#include "ns3/ap-wifi-mac.h"
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#include "ns3/he-configuration.h"
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#include "ns3/packet-socket-helper.h"
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#include "ns3/packet-socket-client.h"
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#include "ns3/packet-socket-server.h"
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using namespace ns3;
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std::vector<uint32_t> bytesReceived (4);
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uint32_t
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ContextToNodeId (std::string context)
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{
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std::string sub = context.substr (10);
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uint32_t pos = sub.find ("/Device");
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return atoi (sub.substr (0, pos).c_str ());
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}
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void
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SocketRx (std::string context, Ptr<const Packet> p, const Address &addr)
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{
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uint32_t nodeId = ContextToNodeId (context);
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bytesReceived[nodeId] += p->GetSize ();
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}
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int
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main (int argc, char *argv[])
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{
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double duration = 10.0; // seconds
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double d1 = 30.0; // meters
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double d2 = 30.0; // meters
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double d3 = 150.0; // meters
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double powSta1 = 10.0; // dBm
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double powSta2 = 10.0; // dBm
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double powAp1 = 21.0; // dBm
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double powAp2 = 21.0; // dBm
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double ccaEdTrSta1 = -62; // dBm
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double ccaEdTrSta2 = -62; // dBm
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double ccaEdTrAp1 = -62; // dBm
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double ccaEdTrAp2 = -62; // dBm
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uint32_t payloadSize = 1500; // bytes
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uint32_t mcs = 0; // MCS value
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double interval = 0.001; // seconds
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bool enableObssPd = true;
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double obssPdThreshold = -72.0; // dBm
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CommandLine cmd;
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cmd.AddValue ("duration", "Duration of simulation (s)", duration);
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cmd.AddValue ("interval", "Inter packet interval (s)", interval);
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cmd.AddValue ("enableObssPd", "Enable/disable OBSS_PD", enableObssPd);
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cmd.AddValue ("d1", "Distance between STA1 and AP1 (m)", d1);
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cmd.AddValue ("d2", "Distance between STA2 and AP2 (m)", d2);
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cmd.AddValue ("d3", "Distance between AP1 and AP2 (m)", d3);
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cmd.AddValue ("powSta1", "Power of STA1 (dBm)", powSta1);
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cmd.AddValue ("powSta2", "Power of STA2 (dBm)", powSta2);
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cmd.AddValue ("powAp1", "Power of AP1 (dBm)", powAp1);
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cmd.AddValue ("powAp2", "Power of AP2 (dBm)", powAp2);
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cmd.AddValue ("ccaEdTrSta1", "CCA-ED Threshold of STA1 (dBm)", ccaEdTrSta1);
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cmd.AddValue ("ccaEdTrSta2", "CCA-ED Threshold of STA2 (dBm)", ccaEdTrSta2);
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cmd.AddValue ("ccaEdTrAp1", "CCA-ED Threshold of AP1 (dBm)", ccaEdTrAp1);
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cmd.AddValue ("ccaEdTrAp2", "CCA-ED Threshold of AP2 (dBm)", ccaEdTrAp2);
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cmd.AddValue ("mcs", "The constant MCS value to transmit HE PPDUs", mcs);
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cmd.Parse (argc, argv);
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NodeContainer wifiStaNodes;
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wifiStaNodes.Create (2);
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NodeContainer wifiApNodes;
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wifiApNodes.Create (2);
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SpectrumWifiPhyHelper spectrumPhy = SpectrumWifiPhyHelper::Default ();
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Ptr<MultiModelSpectrumChannel> spectrumChannel = CreateObject<MultiModelSpectrumChannel> ();
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Ptr<FriisPropagationLossModel> lossModel = CreateObject<FriisPropagationLossModel> ();
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spectrumChannel->AddPropagationLossModel (lossModel);
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Ptr<ConstantSpeedPropagationDelayModel> delayModel = CreateObject<ConstantSpeedPropagationDelayModel> ();
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spectrumChannel->SetPropagationDelayModel (delayModel);
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spectrumPhy.SetChannel (spectrumChannel);
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spectrumPhy.SetErrorRateModel ("ns3::YansErrorRateModel");
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spectrumPhy.Set ("Frequency", UintegerValue (5180)); // channel 36 at 20 MHz
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spectrumPhy.SetPreambleDetectionModel ("ns3::ThresholdPreambleDetectionModel");
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//TODO: add parameter to configure CCA-PD
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WifiHelper wifi;
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wifi.SetStandard (WIFI_PHY_STANDARD_80211ax_5GHZ);
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if (enableObssPd)
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{
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wifi.SetObssPdAlgorithm ("ns3::ConstantObssPdAlgorithm",
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"ObssPdLevel", DoubleValue (obssPdThreshold));
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}
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WifiMacHelper mac;
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std::ostringstream oss;
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oss << "HeMcs" << mcs;
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wifi.SetRemoteStationManager ("ns3::ConstantRateWifiManager",
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"DataMode", StringValue (oss.str ()),
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"ControlMode", StringValue (oss.str ()));
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spectrumPhy.Set ("TxPowerStart", DoubleValue (powSta1));
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spectrumPhy.Set ("TxPowerEnd", DoubleValue (powSta1));
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spectrumPhy.Set ("CcaEdThreshold", DoubleValue (ccaEdTrSta1));
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spectrumPhy.Set ("RxSensitivity", DoubleValue (-92.0));
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Ssid ssidA = Ssid ("A");
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mac.SetType ("ns3::StaWifiMac",
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"Ssid", SsidValue (ssidA));
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NetDeviceContainer staDeviceA = wifi.Install (spectrumPhy, mac, wifiStaNodes.Get (0));
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spectrumPhy.Set ("TxPowerStart", DoubleValue (powAp1));
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spectrumPhy.Set ("TxPowerEnd", DoubleValue (powAp1));
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spectrumPhy.Set ("CcaEdThreshold", DoubleValue (ccaEdTrAp1));
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spectrumPhy.Set ("RxSensitivity", DoubleValue (-92.0));
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mac.SetType ("ns3::ApWifiMac",
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"Ssid", SsidValue (ssidA));
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NetDeviceContainer apDeviceA = wifi.Install (spectrumPhy, mac, wifiApNodes.Get (0));
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Ptr<WifiNetDevice> apDevice = apDeviceA.Get (0)->GetObject<WifiNetDevice> ();
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Ptr<ApWifiMac> apWifiMac = apDevice->GetMac ()->GetObject<ApWifiMac> ();
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if (enableObssPd)
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{
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apDevice->GetHeConfiguration ()->SetAttribute ("BssColor", UintegerValue (1));
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}
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spectrumPhy.Set ("TxPowerStart", DoubleValue (powSta2));
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spectrumPhy.Set ("TxPowerEnd", DoubleValue (powSta2));
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spectrumPhy.Set ("CcaEdThreshold", DoubleValue (ccaEdTrSta2));
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spectrumPhy.Set ("RxSensitivity", DoubleValue (-92.0));
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Ssid ssidB = Ssid ("B");
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mac.SetType ("ns3::StaWifiMac",
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"Ssid", SsidValue (ssidB));
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NetDeviceContainer staDeviceB = wifi.Install (spectrumPhy, mac, wifiStaNodes.Get (1));
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spectrumPhy.Set ("TxPowerStart", DoubleValue (powAp2));
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spectrumPhy.Set ("TxPowerEnd", DoubleValue (powAp2));
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spectrumPhy.Set ("CcaEdThreshold", DoubleValue (ccaEdTrAp2));
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spectrumPhy.Set ("RxSensitivity", DoubleValue (-92.0));
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mac.SetType ("ns3::ApWifiMac",
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"Ssid", SsidValue (ssidB));
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NetDeviceContainer apDeviceB = wifi.Install (spectrumPhy, mac, wifiApNodes.Get (1));
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Ptr<WifiNetDevice> ap2Device = apDeviceB.Get (0)->GetObject<WifiNetDevice> ();
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apWifiMac = ap2Device->GetMac ()->GetObject<ApWifiMac> ();
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if (enableObssPd)
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{
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ap2Device->GetHeConfiguration ()->SetAttribute ("BssColor", UintegerValue (2));
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}
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MobilityHelper mobility;
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Ptr<ListPositionAllocator> positionAlloc = CreateObject<ListPositionAllocator> ();
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positionAlloc->Add (Vector (0.0, 0.0, 0.0)); // AP1
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positionAlloc->Add (Vector (d3, 0.0, 0.0)); // AP2
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positionAlloc->Add (Vector (0.0, d1, 0.0)); // STA1
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positionAlloc->Add (Vector (d3, d2, 0.0)); // STA2
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mobility.SetMobilityModel ("ns3::ConstantPositionMobilityModel");
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mobility.SetPositionAllocator (positionAlloc);
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mobility.Install (wifiApNodes);
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mobility.Install (wifiStaNodes);
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PacketSocketHelper packetSocket;
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packetSocket.Install (wifiApNodes);
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packetSocket.Install (wifiStaNodes);
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ApplicationContainer apps;
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TypeId tid = TypeId::LookupByName ("ns3::UdpSocketFactory");
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//BSS 1
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{
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PacketSocketAddress socketAddr;
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socketAddr.SetSingleDevice (staDeviceA.Get (0)->GetIfIndex ());
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socketAddr.SetPhysicalAddress (apDeviceA.Get (0)->GetAddress ());
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socketAddr.SetProtocol (1);
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Ptr<PacketSocketClient> client = CreateObject<PacketSocketClient> ();
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client->SetRemote (socketAddr);
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wifiStaNodes.Get (0)->AddApplication (client);
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client->SetAttribute ("PacketSize", UintegerValue (payloadSize));
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client->SetAttribute ("MaxPackets", UintegerValue (0));
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client->SetAttribute ("Interval", TimeValue (Seconds (interval)));
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Ptr<PacketSocketServer> server = CreateObject<PacketSocketServer> ();
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server->SetLocal (socketAddr);
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wifiApNodes.Get (0)->AddApplication (server);
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}
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// BSS 2
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{
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PacketSocketAddress socketAddr;
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socketAddr.SetSingleDevice (staDeviceB.Get (0)->GetIfIndex ());
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socketAddr.SetPhysicalAddress (apDeviceB.Get (0)->GetAddress ());
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socketAddr.SetProtocol (1);
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Ptr<PacketSocketClient> client = CreateObject<PacketSocketClient> ();
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client->SetRemote (socketAddr);
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wifiStaNodes.Get (1)->AddApplication (client);
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client->SetAttribute ("PacketSize", UintegerValue (payloadSize));
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client->SetAttribute ("MaxPackets", UintegerValue (0));
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client->SetAttribute ("Interval", TimeValue (Seconds (interval)));
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Ptr<PacketSocketServer> server = CreateObject<PacketSocketServer> ();
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server->SetLocal (socketAddr);
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wifiApNodes.Get (1)->AddApplication (server);
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}
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Config::Connect ("/NodeList/*/ApplicationList/*/$ns3::PacketSocketServer/Rx", MakeCallback (&SocketRx));
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Simulator::Stop (Seconds (duration));
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Simulator::Run ();
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Simulator::Destroy ();
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for (uint32_t i = 0; i < 2; i++)
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{
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double throughput = static_cast<double> (bytesReceived[2 + i]) * 8 / 1000 / 1000 / duration;
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std::cout << "Throughput for BSS " << i + 1 << ": " << throughput << " Mbit/s" << std::endl;
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}
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return 0;
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}
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